Fitting making apparatus



June 19, 1934. c. H. SMITH 1,963,507

FITTING MAKING APPARATUS Original Filed July 29. 1931 2 SheetsSheet 1 Zhwentor /4/6265 #i/v/ey JM/m.

June 19, 1934. c. H. SMITH 1,963,507

FITTING MAKING APPARATUS Original Filed July 29, 1931 2 Sheets-Sheet 2 Patented June 19, 1934 UNITED STATES AT N OFFICE.

553,785. Divided and this I 1932, Serial vl I0.'( i09,'14l5 application May .4,

I 40mins (01. 153- 481) invention relates to a novel apparatus for formingifitting-s to =be-used by tube still ends.

In order :to clamp tube still ends securely in place fittings are provided having a body of cylindrical shape with upstanding ears arranged in parallelism and :forming .a continuation with the cylindrical body. The temperatures and pressures'mder such part-s operate make it necessary "to provide a fitting as strong as 5 possible. Accordingly it isdesirable-to forge such a-fitting but the form :of the fitting prohibits satisfactory commercial forging. Accordingly. it is convenient to make the fitting with the ears bent so as to extend laterally from the cylinndri-l cal body in which position the .fitting can be forged more readily. ,It is then necessary to shape the forging to suitable form tobe used as .a

It is an-object ofv the inventionto provide'a novel apparatus in which Iorgings having acylindricalllbody andclaterallyrextending ears may be shaped into fittings adapted for use in clamping tube still ends. Other objects and advantages of the invention will be seen in the follow- 3 ing detailed description taken in connection with the accompanying drawings in which: Figure 1 is a front ,view of a press in which the forming apparatus comprising the present invention has been installed.

Figure 2 is a side elevation of the assembled device.

Figure 3 is a plan View of a roller die carrying fixture employed in connection with the present invention.

Figure 4 is a side elevation of the fixture shown in Figure 3.

Figure 5 is a side elevation of the preformed forged article preparatory to its introduction into the machine, and

Figure 6 is a side elevation of the finished cracking still tube end.

In all of the above described views, like characters of reference are employed to designate like parts throughout.

Referring now to Figure 6 the finished article is designated at 10. This article comprises a body portion 12 having a bore 14 extending axially therethrough which bore is adapted to com municate with the tube ends of the cracking still. A pair of parallel extending ears 16 having 'slots 18 therein project from the body for the purpose of securing the tube ends in place by a clamping mechanism not disclosed.

In Figure 5 the preformed article as it emerges from the forging dies is disclosed and in this View the cars 16 are shown as-extending laterally in opposite directions from the body portions 12 of the fitting. The forming of the articles into this sha'pe'is-convenient from the standpoint of facility in forging and the improved mechanism iseadaptedato receive the article in the form shown in Figure 5 and operateupon the same to shape it into the form shown in Figure 6.

' Referring now to Figure '1 a' press is designated in its entirety at '20. This press comprises a base :22 having a bed plate 24 and :a plurality of standards 26 across the upper ends of which there extends a crank 28 having an 'eccen-tric portion 30. Outside of the standards 26 ther is provided a fly wheel 32.' The ram of the press is designated at 34 and is vertically movable in guides 36 on the inner sides of the standards '26. This ram carries a wrist pin '38 whichisconnected to the eccentric portion. .30 of the crank. :28 by. means of a connecting .rod 40; Thus. :it will .be seen that .upon rotation .of. the crank 28 the ram 34 will be reciprocated vertically. The lower end of the ram 34 is provided with a dove-tail slot 42 for the purpose of securing thereto an upper die member 44. This upper die member is in the form of an elongated tool having convex portions 46 extending throughout its length.

Secured to the bed plate 24 by means of bolts 48 is a fixture 50 having a base 52 and side members 54 from which a portion of the metal has been removed as at 56 to lighten the structure and to further the interests of economy in manufacture. These side members 54 are each provided with a ledge 58 upon which two sets of bearing blocks 60, 62 and 64, 66 are slidably disposed. The side members 54 are connected together at their upper ends by end members 68. Each of the bearing blocks is provided with a slot 70 in which is disposed the head 72 of an adjusting bolt 74. These adjusting bolts extend through the sides of the slots 70 and are threaded through one of the end members 68. By means of these adjusting bolts 74 the position and spacing of the bearing blocks 60, 62, 64, 66 on the ledge 58 may be varied. A roller die element '76 is rotatably journaled in the bearing blocks 60, 62 while a similar die element '78 is journaled in the bearing block 64, 66. It will be seen therefore that the distance between these roller die elements may be varied by means of the adjusting bolts '74. The rollers 76 and 78 are similar in shape and are substantially in the form of a hyperbole. of revolution to accommodate the curvature of the articles to be manufactured as clearly shown in Figure 3. In actual operation the ram 34 of the press 20 is maintained in its elevated position. The operator places one of the preformed articles shown in Figure 5 and previously described in position with its body portion 12 engaging both of the rollers '76 and '78 and with the ears 16 of the same resting on these rollers. The ram is then brought into action to descend upon the fixture 50. Accordingly the lower end of the upper die element 44 engages the body portion 12 of the fitting between the ears 16 and forces the same downwardly. The ears 16 resting upon the hyperbolic rollers are ironed, so to speak, into parallel position as clearly shown in Figure 6. It is to be noted that the ears 16 of the member 12 are curved in cross section and because of the hyperbolic curvature of the roller dies 76 the outside curvature of the ears is not destroyed. The curved surface of the upper die element 44 preserves the concave condition of the inner side of the cars 16.

In this specification the roller die elements '78 have been referred to as being hyperbolic roller die elements. This reference to a hyperbola is employed for convenience as these roller die elements appear to have surfaces which are in the form of a hyperbola of revolution. The die elements in reality have surfaces which are in the form of curves of revolution and it is to be distinctly understood that reference to a hyperbola is not to be construed as limiting the shape of these roller die elements to a true geometric hyperbola of revolution.

This application is a division of a co-pending application filed by applicant on July 29, 1931, Serial No. 553,785.

' The invention is not to be limited to the exact arrangement of parts shown in the accompanying drawings or described in this specification as various details in the construction may be resorted to without departing from the spirit of the invention. Only in so far as the invention is particularly pointed out in the accompanying claims is the same to be limited.

What I claim is:

1. An apparatus for forming preshaped articles having a body portion and laterally extending ears, comprising a pair of rollers having roller surfaces shaped to conform to the configuration of the outer surfaces of said ears, said rollers being adapted to receive the ears thereon with the body portion positioned between said rollers and means for forcing the body portion downwardly between said rollers to iron said ears into substantial parallelism.

2. An apparatus for forming tube ends comprising a pair of parallel rollers having hyperbolic roller surfaces, said rollers being spaced apart and adapted to receive the articles to be formed therebetween, a movable die element adapted to engage the article to force the same downwardly between said rollers, the sides of said die element being curved in cross section to conform to the curvature of said hyperbolic rollers.

3; A device for forming fittings from a forged cylindrical body having laterally extending ears comprising a draw die having surfaces adapted to shape the ears into parallel arrangement with the axis of the body and for maintaining the ears in sector form, and means for passing the forging through the die.

'4. A device for forming fittings from a forging having a cylindrical body and laterally extending ears comprising a draw die adapted to re ceive the cylindrical body of the forging and to bend and shape the ears into parallel alignment with the axis of the cylindrical body with the ears in sector form, and means for drawing the forging through the die.

CHARLES HENRY SMITH. 

